小电流接地故障初相角模拟试验控制系统的设计  

Design of control system for initial phase simulating test of single-phase earthed fault for small current in non-effectively grounded system

作　　者：段秀凯 张新慧[1] 王玮[1] 梁永省 石毅[1] 

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049

出　　处：《电测与仪表》2016年第6期12-16,26,共6页Electrical Measurement & Instrumentation

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA050213)

摘　　要：针对小电流接地故障物理模拟试验设计了故障初相角控制系统。分析了故障初相角对小电流接地系统暂态信号的影响,给出了故障初相角控制系统的设计原理和工作逻辑,重点介绍了系统的硬件组成和软件控制过程,其中硬件组成包括过零检测电路、单片机以及可控硅的驱动电路;软件控制过程即CPU的工作程序流程。将故障初相角控制系统接入有源配电网静态模拟系统进行小电流接地故障模拟试验,试验结果表明该控制系统能精确地控制故障初相角的大小。A fault initial phase controlled system for physical simulation experiment of single-phase grounding fault for small current is designed. The effect of fault initial phase on characteristics of transient signals is analyzed. The design principles and operating logic of fault initial phase controlled system is given. Hardware components and software control process are mainly discussed. Hardware components include zero-crossing detection circuit,MCU and SCR driven circuit. Software control process describes the working program flow of CPU. Taking the fault initial phase controlled system connected to a static simulation system for active distribution network and doing the single-phase grounding fault experiment,the experimental results show that fault initial phase can be precisely controlled by the system.

关 键 词：小电流接地系统 故障初相角 暂态特征 控制系统 

分 类 号：TM743[电气工程—电力系统及自动化]